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f1407d5c KM |
1 | /* |
2 | * Renesas USB driver | |
3 | * | |
4 | * Copyright (C) 2011 Renesas Solutions Corp. | |
5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
15 | * | |
16 | */ | |
17 | #include <linux/interrupt.h> | |
18 | ||
19 | #include "./common.h" | |
20 | #include "./mod.h" | |
21 | ||
22 | #define usbhs_priv_to_modinfo(priv) (&priv->mod_info) | |
b002ff6e KM |
23 | #define usbhs_mod_info_call(priv, func, param...) \ |
24 | ({ \ | |
25 | struct usbhs_mod_info *info; \ | |
26 | info = usbhs_priv_to_modinfo(priv); \ | |
27 | !info->func ? 0 : \ | |
28 | info->func(param); \ | |
29 | }) | |
30 | ||
31 | /* | |
32 | * autonomy | |
33 | * | |
34 | * these functions are used if platform doesn't have external phy. | |
35 | * -> there is no "notify_hotplug" callback from platform | |
36 | * -> call "notify_hotplug" by itself | |
37 | * -> use own interrupt to connect/disconnect | |
38 | * -> it mean module clock is always ON | |
39 | * ~~~~~~~~~~~~~~~~~~~~~~~~~ | |
40 | */ | |
41 | static int usbhsm_autonomy_get_vbus(struct platform_device *pdev) | |
42 | { | |
43 | struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); | |
44 | ||
45 | return VBSTS & usbhs_read(priv, INTSTS0); | |
46 | } | |
47 | ||
48 | static int usbhsm_autonomy_irq_vbus(struct usbhs_priv *priv, | |
49 | struct usbhs_irq_state *irq_state) | |
50 | { | |
51 | struct platform_device *pdev = usbhs_priv_to_pdev(priv); | |
52 | ||
53 | return usbhsc_drvcllbck_notify_hotplug(pdev); | |
54 | } | |
55 | ||
56 | void usbhs_mod_autonomy_mode(struct usbhs_priv *priv) | |
57 | { | |
58 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
59 | ||
60 | info->irq_vbus = usbhsm_autonomy_irq_vbus; | |
48298206 | 61 | priv->pfunc.get_vbus = usbhsm_autonomy_get_vbus; |
b002ff6e KM |
62 | |
63 | usbhs_irq_callback_update(priv, NULL); | |
64 | } | |
f1407d5c KM |
65 | |
66 | /* | |
67 | * host / gadget functions | |
68 | * | |
69 | * renesas_usbhs host/gadget can register itself by below functions. | |
70 | * these functions are called when probe | |
71 | * | |
72 | */ | |
73 | void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *mod, int id) | |
74 | { | |
75 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
76 | ||
77 | info->mod[id] = mod; | |
78 | mod->priv = priv; | |
79 | } | |
80 | ||
81 | struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id) | |
82 | { | |
83 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
84 | struct usbhs_mod *ret = NULL; | |
85 | ||
86 | switch (id) { | |
87 | case USBHS_HOST: | |
88 | case USBHS_GADGET: | |
89 | ret = info->mod[id]; | |
90 | break; | |
91 | } | |
92 | ||
93 | return ret; | |
94 | } | |
95 | ||
0deb3e77 | 96 | int usbhs_mod_is_host(struct usbhs_priv *priv) |
f1407d5c | 97 | { |
0deb3e77 | 98 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
f1407d5c KM |
99 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
100 | ||
101 | if (!mod) | |
102 | return -EINVAL; | |
103 | ||
104 | return info->mod[USBHS_HOST] == mod; | |
105 | } | |
106 | ||
107 | struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv) | |
108 | { | |
109 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
110 | ||
111 | return info->curt; | |
112 | } | |
113 | ||
114 | int usbhs_mod_change(struct usbhs_priv *priv, int id) | |
115 | { | |
116 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); | |
117 | struct usbhs_mod *mod = NULL; | |
118 | int ret = 0; | |
119 | ||
120 | /* id < 0 mean no current */ | |
121 | switch (id) { | |
122 | case USBHS_HOST: | |
123 | case USBHS_GADGET: | |
124 | mod = info->mod[id]; | |
125 | break; | |
126 | default: | |
127 | ret = -EINVAL; | |
128 | } | |
129 | info->curt = mod; | |
130 | ||
131 | return ret; | |
132 | } | |
133 | ||
134 | static irqreturn_t usbhs_interrupt(int irq, void *data); | |
135 | int usbhs_mod_probe(struct usbhs_priv *priv) | |
136 | { | |
137 | struct device *dev = usbhs_priv_to_dev(priv); | |
138 | int ret; | |
139 | ||
2f98382d KM |
140 | /* |
141 | * install host/gadget driver | |
142 | */ | |
034d7c13 | 143 | ret = usbhs_mod_host_probe(priv); |
2f98382d KM |
144 | if (ret < 0) |
145 | return ret; | |
146 | ||
034d7c13 KM |
147 | ret = usbhs_mod_gadget_probe(priv); |
148 | if (ret < 0) | |
149 | goto mod_init_host_err; | |
150 | ||
f1407d5c KM |
151 | /* irq settings */ |
152 | ret = request_irq(priv->irq, usbhs_interrupt, | |
b5dd18d8 | 153 | 0, dev_name(dev), priv); |
2f98382d | 154 | if (ret) { |
f1407d5c | 155 | dev_err(dev, "irq request err\n"); |
2f98382d KM |
156 | goto mod_init_gadget_err; |
157 | } | |
158 | ||
159 | return ret; | |
160 | ||
161 | mod_init_gadget_err: | |
162 | usbhs_mod_gadget_remove(priv); | |
034d7c13 KM |
163 | mod_init_host_err: |
164 | usbhs_mod_host_remove(priv); | |
f1407d5c KM |
165 | |
166 | return ret; | |
167 | } | |
168 | ||
169 | void usbhs_mod_remove(struct usbhs_priv *priv) | |
170 | { | |
034d7c13 | 171 | usbhs_mod_host_remove(priv); |
2f98382d | 172 | usbhs_mod_gadget_remove(priv); |
f1407d5c KM |
173 | free_irq(priv->irq, priv); |
174 | } | |
175 | ||
176 | /* | |
177 | * status functions | |
178 | */ | |
f1407d5c KM |
179 | int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state) |
180 | { | |
181 | int state = irq_state->intsts0 & DVSQ_MASK; | |
182 | ||
183 | switch (state) { | |
184 | case POWER_STATE: | |
185 | case DEFAULT_STATE: | |
186 | case ADDRESS_STATE: | |
187 | case CONFIGURATION_STATE: | |
188 | return state; | |
189 | } | |
190 | ||
191 | return -EIO; | |
192 | } | |
193 | ||
194 | int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state) | |
195 | { | |
196 | /* | |
197 | * return value | |
198 | * | |
199 | * IDLE_SETUP_STAGE | |
200 | * READ_DATA_STAGE | |
201 | * READ_STATUS_STAGE | |
202 | * WRITE_DATA_STAGE | |
203 | * WRITE_STATUS_STAGE | |
204 | * NODATA_STATUS_STAGE | |
205 | * SEQUENCE_ERROR | |
206 | */ | |
207 | return (int)irq_state->intsts0 & CTSQ_MASK; | |
208 | } | |
209 | ||
210 | static void usbhs_status_get_each_irq(struct usbhs_priv *priv, | |
211 | struct usbhs_irq_state *state) | |
212 | { | |
213 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
214 | ||
215 | state->intsts0 = usbhs_read(priv, INTSTS0); | |
216 | state->intsts1 = usbhs_read(priv, INTSTS1); | |
217 | ||
f1407d5c | 218 | /* mask */ |
5ea68d54 KM |
219 | if (mod) { |
220 | state->brdysts = usbhs_read(priv, BRDYSTS); | |
221 | state->nrdysts = usbhs_read(priv, NRDYSTS); | |
222 | state->bempsts = usbhs_read(priv, BEMPSTS); | |
223 | ||
224 | state->bempsts &= mod->irq_bempsts; | |
225 | state->brdysts &= mod->irq_brdysts; | |
226 | } | |
f1407d5c KM |
227 | } |
228 | ||
229 | /* | |
230 | * interrupt | |
231 | */ | |
232 | #define INTSTS0_MAGIC 0xF800 /* acknowledge magical interrupt sources */ | |
233 | #define INTSTS1_MAGIC 0xA870 /* acknowledge magical interrupt sources */ | |
234 | static irqreturn_t usbhs_interrupt(int irq, void *data) | |
235 | { | |
236 | struct usbhs_priv *priv = data; | |
237 | struct usbhs_irq_state irq_state; | |
238 | ||
239 | usbhs_status_get_each_irq(priv, &irq_state); | |
240 | ||
241 | /* | |
242 | * clear interrupt | |
243 | * | |
244 | * The hardware is _very_ picky to clear interrupt bit. | |
245 | * Especially INTSTS0_MAGIC, INTSTS1_MAGIC value. | |
246 | * | |
247 | * see | |
248 | * "Operation" | |
249 | * - "Control Transfer (DCP)" | |
250 | * - Function :: VALID bit should 0 | |
251 | */ | |
252 | usbhs_write(priv, INTSTS0, ~irq_state.intsts0 & INTSTS0_MAGIC); | |
253 | usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC); | |
254 | ||
255 | usbhs_write(priv, BRDYSTS, 0); | |
256 | usbhs_write(priv, NRDYSTS, 0); | |
257 | usbhs_write(priv, BEMPSTS, 0); | |
258 | ||
259 | /* | |
260 | * call irq callback functions | |
261 | * see also | |
262 | * usbhs_irq_setting_update | |
263 | */ | |
89c1d2e7 KM |
264 | |
265 | /* INTSTS0 */ | |
b002ff6e KM |
266 | if (irq_state.intsts0 & VBINT) |
267 | usbhs_mod_info_call(priv, irq_vbus, priv, &irq_state); | |
268 | ||
f1407d5c KM |
269 | if (irq_state.intsts0 & DVST) |
270 | usbhs_mod_call(priv, irq_dev_state, priv, &irq_state); | |
271 | ||
272 | if (irq_state.intsts0 & CTRT) | |
273 | usbhs_mod_call(priv, irq_ctrl_stage, priv, &irq_state); | |
274 | ||
275 | if (irq_state.intsts0 & BEMP) | |
276 | usbhs_mod_call(priv, irq_empty, priv, &irq_state); | |
277 | ||
278 | if (irq_state.intsts0 & BRDY) | |
279 | usbhs_mod_call(priv, irq_ready, priv, &irq_state); | |
280 | ||
89c1d2e7 KM |
281 | /* INTSTS1 */ |
282 | if (irq_state.intsts1 & ATTCH) | |
283 | usbhs_mod_call(priv, irq_attch, priv, &irq_state); | |
284 | ||
285 | if (irq_state.intsts1 & DTCH) | |
286 | usbhs_mod_call(priv, irq_dtch, priv, &irq_state); | |
287 | ||
288 | if (irq_state.intsts1 & SIGN) | |
289 | usbhs_mod_call(priv, irq_sign, priv, &irq_state); | |
290 | ||
291 | if (irq_state.intsts1 & SACK) | |
292 | usbhs_mod_call(priv, irq_sack, priv, &irq_state); | |
293 | ||
f1407d5c KM |
294 | return IRQ_HANDLED; |
295 | } | |
296 | ||
297 | void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod) | |
298 | { | |
299 | u16 intenb0 = 0; | |
89c1d2e7 | 300 | u16 intenb1 = 0; |
b002ff6e | 301 | struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv); |
f1407d5c | 302 | |
651f5e49 KM |
303 | /* |
304 | * BEMPENB/BRDYENB are picky. | |
305 | * below method is required | |
306 | * | |
307 | * - clear INTSTS0 | |
308 | * - update BEMPENB/BRDYENB | |
309 | * - update INTSTS0 | |
310 | */ | |
f1407d5c | 311 | usbhs_write(priv, INTENB0, 0); |
89c1d2e7 | 312 | usbhs_write(priv, INTENB1, 0); |
f1407d5c KM |
313 | |
314 | usbhs_write(priv, BEMPENB, 0); | |
315 | usbhs_write(priv, BRDYENB, 0); | |
316 | ||
317 | /* | |
318 | * see also | |
319 | * usbhs_interrupt | |
320 | */ | |
321 | ||
322 | /* | |
323 | * it don't enable DVSE (intenb0) here | |
324 | * but "mod->irq_dev_state" will be called. | |
325 | */ | |
b002ff6e KM |
326 | if (info->irq_vbus) |
327 | intenb0 |= VBSE; | |
f1407d5c | 328 | |
5ea68d54 | 329 | if (mod) { |
89c1d2e7 KM |
330 | /* |
331 | * INTSTS0 | |
332 | */ | |
5ea68d54 KM |
333 | if (mod->irq_ctrl_stage) |
334 | intenb0 |= CTRE; | |
f1407d5c | 335 | |
5ea68d54 KM |
336 | if (mod->irq_empty && mod->irq_bempsts) { |
337 | usbhs_write(priv, BEMPENB, mod->irq_bempsts); | |
338 | intenb0 |= BEMPE; | |
339 | } | |
f1407d5c | 340 | |
5ea68d54 KM |
341 | if (mod->irq_ready && mod->irq_brdysts) { |
342 | usbhs_write(priv, BRDYENB, mod->irq_brdysts); | |
343 | intenb0 |= BRDYE; | |
344 | } | |
89c1d2e7 KM |
345 | |
346 | /* | |
347 | * INTSTS1 | |
348 | */ | |
349 | if (mod->irq_attch) | |
350 | intenb1 |= ATTCHE; | |
351 | ||
352 | if (mod->irq_attch) | |
353 | intenb1 |= DTCHE; | |
354 | ||
355 | if (mod->irq_sign) | |
356 | intenb1 |= SIGNE; | |
357 | ||
358 | if (mod->irq_sack) | |
359 | intenb1 |= SACKE; | |
f1407d5c KM |
360 | } |
361 | ||
651f5e49 KM |
362 | if (intenb0) |
363 | usbhs_write(priv, INTENB0, intenb0); | |
89c1d2e7 KM |
364 | |
365 | if (intenb1) | |
366 | usbhs_write(priv, INTENB1, intenb1); | |
f1407d5c | 367 | } |